audioOS 9.9.15.5 (build 19L570) is an official Apple over-the-air update for the HomePod, released on 2022-05-16T18:23:46Z. The update package is 1.17 GB. This is a delta (partial) update that requires 14.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d84d46762afa2e77c62e9e4ab2c181467b7e441a.zip.